Vibrational spectrum of glycine molecule

Kumar, Santosh; Amareshwar, K.; Singh, Varun; Rai, S.B.

doi:10.1016/j.saa.2004.09.029

Cited by 138 publications

(84 citation statements)

References 15 publications

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“…The Raman spectrum of GLY is consistent with that reported previously [28,29,30]. It was found that most strong bands could be ascribed to the hydrazine peaks, as previously reported [31,32,33].…”

Section: Resultssupporting

confidence: 91%

Detection of Copper(II) Ions Using Glycine on Hydrazine-Adsorbed Gold Nanoparticles via Raman Spectroscopy

Seo

Joo

2016

Sensors

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A facile, selective, and sensitive detection method for the Cu2+ ions in environmental and biological solutions has been newly developed by observing the unique CN stretching peaks at ~2108 cm−1 upon the dissociative adsorption of glycine (GLY) in hydrazine buffer on gold nanoparticles (AuNPs). The relative abundance of Cu species on AuNPs was identified from X-ray photoelectron spectroscopy analysis. UV-Vis spectra also indicated that the Au particles aggregated to result in the color change owing to the destabilization induced by the GLY-Cu2+ complex. The CN stretching band at ~2108 cm−1 could be observed to indicate the formation of the CN species from GLY on the hydrazine-covered AuNP surfaces. The other ions of Fe3+, Fe2+, Hg2+, Mg2+, Mn2+, Ni2+, Zn2+, Cr3+, Co2+, Cd2+, Pb2+, Ca2+, NH4+, Na+, and K+ at high concentrations of 50 µM did not produce such spectral changes. The detection limit based on the CN band for the determination of the Cu2+ ion could be estimated to be as low as 500 nM in distilled water and 1 µM in river water, respectively. We attempted to apply our method to estimate intracellular ion detection in cancer cells for more practical purposes.

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Section: Resultssupporting

confidence: 91%

Detection of Copper(II) Ions Using Glycine on Hydrazine-Adsorbed Gold Nanoparticles via Raman Spectroscopy

Seo

Joo

2016

Sensors

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“…In this region, the spectra obtained for Ser and SerCD2 samples are practically identical, presenting the expected broad and structured shape typical of amino acids [23][24][25][26][27][28][29][30][31][33][34][35]. Also as expected, the overlapping signals became progressively narrower and more intense on cooling, leading to observation of more pronounced band structure at low temperature.…”

Section: -1800 CMsupporting

confidence: 52%

Low-temperature infrared spectra and hydrogen bonding in polycrystalline dl-serine and deuterated derivatives

Jarmelo

Reva

Rozenberg

et al. 2006

Vibrational Spectroscopy

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The FT-IR spectra of polycrystalline DL-serine [a-amino-b-hydroxypropionic acid; HO-CH 2 -CH(NH 3 ) + -COO À ] and isotopically substituted [ND/OD Alcohol (<10% and >90% D); CD 2 (>98% D)] DL-serine were recorded in the range 4000-500 cm À1 in the temperature range 300-10 K, and fully assigned. The isotopic-doping/low-temperature methodology, which allows for decoupling of individual proton vibrational modes from the crystal bulk vibrations, was used to estimate the energies of the different H-bonds present in DL-serine crystal. To this end, the frequency shifts observed in both the NH/OH stretching and out-of-plane bending spectral regions (relatively to reference values for these vibrations in nonhydrogen-bonded DL-serine molecules) were used, together with previously developed empirical correlations. The results are compared with available structural data on this amino acid. #

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“…Indeed, Dou et al 2 demonstrated that glycine interacts with gold nanoparticles through the amino groups, which are therefore more affected by the plasmon-generated electric field. Furthermore, Kumar et al 32 calculated the position of this vibration by the ab initio method and found a position at 720 cm 1 , which was experimentally observed at 697 cm 1 . The other main peaks are located at 877 cm 1 (NH 2 twist), 962-1031 cm 1 (C-C and C-N stretch), 1317-1347 cm 1 (NH 2 -CH 2 twist).…”

Section: Sers With Gold Nanotrianglesmentioning

confidence: 90%

SERS intensity optimization by controlling the size and shape of faceted gold nanoparticles

Sabur

Havel

Gogotsi

2007

J Raman Spectroscopy

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In this work, we experimentally investigated the surface-enhanced Raman spectroscopy (SERS) activity of faceted gold nanoparticles, which have been theoretically predicted to yield giant enhancements. Glycine was used to determine the SERS activity as a function of pH and ionic strength and to estimate the corresponding enhancement factor (EF). By optimizing the synthesis conditions of the flat prismatic nanoparticles, it was possible to control their size and shape. We demonstrate that the maximum SERS intensity increases with the edge length of the triangle, reaching a maximum EF of ∼10 13 for 1.9 µm triangles (the largest tested). The corresponding glycine detection limit was as low as 10 −12 M, close to the single-molecule threshold.

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Vibrational spectrum of glycine molecule

Cited by 138 publications

References 15 publications

Detection of Copper(II) Ions Using Glycine on Hydrazine-Adsorbed Gold Nanoparticles via Raman Spectroscopy

Detection of Copper(II) Ions Using Glycine on Hydrazine-Adsorbed Gold Nanoparticles via Raman Spectroscopy

Low-temperature infrared spectra and hydrogen bonding in polycrystalline dl-serine and deuterated derivatives

SERS intensity optimization by controlling the size and shape of faceted gold nanoparticles

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